yum提示Another app is currently holding the yum lock

错误信息：

Another app is currently holding the yum lock; waiting for it to exit… The other application is: yum Memory : 125 M RSS (1.3 GB VSZ) Started: Sun Jul 8 08:48:46 2018 - 03:43 ago State : Running, pid: 898  

强制关掉yum进程：

rm -f /var/run/yum.pid